In Dane County transactions, a radon result over 4 pCi/L is one of the most common inspection findings there is — closer to a tired water heater than a structural defect. It has a known fix with a known price range. The whole game is handling it calmly inside the contract timeline.
Testing inside the inspection window
The buyer's monitor runs 48 hours under closed-house conditions, usually placed at the general inspection and read two days later. Book them together so the radon report lands with time to negotiate.
Monitors log hourly and flag interference — windows opened, unit moved. A flagged or borderline result supports a retest request, not a guess either direction.
Three clean resolutions
Seller installs before closing; seller credits the cost at closing; buyer accepts the number and mitigates after moving in. All three close houses every week in Madison. The credit route has a quiet advantage: you pick the installer, you hold the warranty, and the work happens on your schedule.
If the seller installs, write the post-mitigation test into the agreement — an invoice proves a fan was bought, not that the number came down.
The folder you want at the end
Original test report, installation documentation with warranty, passing retest below 4 — ideally under 2. That folder answers every future buyer's agent in Dane County before they finish asking.
Sellers can play offense
Test before listing. A high number fixed on your own timeline costs less than the same number negotiated under deadline with a buyer's quote in hand — and a documented working system becomes a line in the listing instead of a hitch in the closing.
Keep it in proportion
A high test never needs to kill a Dane County deal: it is a priced, solvable, one-day fix with a verification test at the end. Handle it inside the timeline, insist on documentation, and move on to the things that actually distinguish houses.
Radon is the rare inspection finding with a complete solution — treat it that way at the negotiating table.
